# Adding Machine 10Key iPhone vs 12Calc

The clearest difference is price: Adding Machine 10Key iPhone at $2.99 against 12Calc's $8.99. Adding Machine 10Key iPhone also leads on update cadence (every 5 weeks vs every 5 months) and chart position (#49 vs #183). 12Calc's advantage is rating (4.9 vs 4.6) and ratings volume (916 vs 130). On review sentiment, ads, in-app purchases and device support there is nothing between them.

Adding Machine 10Key iPhone costs $2.99 and 12Calc $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

12Calc holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: 12Calc has 916 ratings behind it against 130, so its average is the more settled of the two. Written reviews split almost evenly too, at 95% and 96% positive.

Adding Machine 10Key iPhone ships an update every 5 weeks, 12Calc every 5 months. The most recent releases landed on September 22, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Adding Machine 10Key iPhone | 12Calc |
| --- | --- | --- |
| Price | **$2.99** | $8.99 |
| Rating | [4.6 (130 ratings)](https://appshunter.io/ios/app/adding-machine-10key-iphone/id392883834/reviews) | **[4.9 (916 ratings)](https://appshunter.io/ios/app/12calc/id780780002/reviews)** |
| Number of ratings | 130 | **916** |
| Positive reviews | 95.2% of reviews | **95.9% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 5 months |
| Monetization | **Free** | Paid |
| Best chart rank | **#49** | #183 |
| Size | 10 MB | 6 MB |
| Requires iOS | **12.4** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Richard Silverman](https://appshunter.io/developer/297096643) | [Ernest Brock](https://appshunter.io/developer/289555912) |

## What reviewers say

### Adding Machine 10Key iPhone

[App page](https://appshunter.io/ios/app/adding-machine-10key-iphone/id392883834)

**Currently charting:** #49 Top Paid · Finance (US App Store)

This app emulates a traditional 10-key adding machine, offering reversed operator entry and percentage calculation. Users can edit and save paper tapes, export them to various services, and customize keypad sounds. It's designed for accurate and efficient numerical input.

**Highlights:** True 10-key adding machine emulation, Reversed operator entry, Percentage calculation, Editable paper tape history, Save and retrieve paper tape files, Export paper tape to iBooks, Dropbox, or printing utilities

**In-app purchases:** none

**What reviewers like**

- 👍 Works like a real adding machine
- 👍 Tape feature is excellent
- 👍 Easy to use and user-friendly
- 👍 Good for complex calculations
- 👍 Allows editing of numbers

**What reviewers complain about**

- 🐛 Watermarks premium exports
- 🐛 Haphazardly laid out controls
- 🐛 Touchy sound toggle in free version
- 🐛 Keypad glitch on re-opening
- 🐛 Nagging review requests

**Reported bugs**

- Watermarks premium PDF exports
- Haphazardly laid out controls
- Touchy sound toggle in free version
- Keypad glitch on re-opening
- Nagging review requests (Don't ask again button not working)

**Requested features**

- Eliminate tape for bigger total screen
- Add square root feature
- Bring back custom keypad feature on iPhone version
- Allow more than 350 lines
- Allow more notations on tape


### 12Calc

[App page](https://appshunter.io/ios/app/12calc/id780780002)

**Currently charting:** #183 Top Paid · Finance (US App Store)

This app provides a full-featured financial calculator experience, replicating the functionality of a popular physical model. It offers an audit tape for tracking calculations, a unit converter with currency exchange rates, and various worksheets with interactive graphs for financial analysis. Optimized for modern devices with high-resolution graphics and support for multiple orientations.

**Highlights:** HP12C emulation, Audit tape for calculation history, Unit and currency converter, Interactive financial worksheets, Portrait and landscape views, Contextual help and tutorials, HD graphics with color themes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Adding Machine 10Key iPhone free?

Adding Machine 10Key iPhone costs $2.99, with no in-app purchases.

### Is 12Calc free?

12Calc costs $8.99, with no in-app purchases.

### Which has better reviews, Adding Machine 10Key iPhone or 12Calc?

12Calc is rated higher. Adding Machine 10Key iPhone averages 4.6 out of 5 from 130 ratings, while 12Calc averages 4.9 from 916 ratings.

### Do Adding Machine 10Key iPhone or 12Calc have ads?

Neither Adding Machine 10Key iPhone nor 12Calc shows ads.

### Which is updated more often, Adding Machine 10Key iPhone or 12Calc?

Adding Machine 10Key iPhone ships an update every 5 weeks, and 12Calc every 5 months. Most recently, Adding Machine 10Key iPhone was updated on September 22, 2026 and 12Calc on September 25, 2026.

### Which is more popular, Adding Machine 10Key iPhone or 12Calc?

Adding Machine 10Key iPhone currently peaks at #49 in the App Store charts, and 12Calc at #183. Chart position reflects recent download velocity rather than total install base.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*